Airboat: airboat, a mixture of airplane and boat with the resultant thrills of both. of course it is a boat powered by an airplane type propellor with large above the water rudders.. Hovercraft. yes. a hovercraft. get building. six wheeler atv . lots of traction and torque make this six-wheeler atv a curious project. airboat snow sled. Building your own boat is an ideal way to gain the satisfaction of the time spent laboring and customizing your own boat. wooden boat plans can guide you through the process from start to finish and will get you out on the water..